Preakness Stakes

Kentucky Derby winner Orb stands as he is cooled down after a workout at Pimlico Race Course in Baltimore, Friday, May 17, 2013. The Preakness Stakes horse race is scheduled to take place May 18. (AP Photo/Patrick Semansky)

Kentucky Derby winner Orb stands as he is cooled down after a workout at Pimlico Race Course in Baltimore, Friday, May 17, 2013. The Preakness Stakes horse race is scheduled to take place May 18. (AP Photo/Patrick Semansky)

A groom washes Kentucky Derby winner Orb after a workout at Pimlico Race Course in Baltimore, Friday, May 17, 2013. The Preakness Stakes horse race is scheduled to take place May 18. (AP Photo/Patrick Semansky)

Spectator Kathryn Gaudreau tries to stay dry under a poncho as rain falls at Pimlico Race Course in Baltimore, Saturday, May 18, 2013, before the 138th running of the Preakness Stakes horse race. (AP Photo/Patrick Semansky)

Exercise rider Trina Pasckvale stands with Departing after a workout at Pimlico Race Course in Baltimore, Saturday, May 18, 2013, on the morning of the 138th running of the Preakness Stakes horse race. (AP Photo/Patrick Semansky)

A spectator wears a poncho as rain falls during a horse race at Pimlico Race Course in Baltimore, Saturday, May 18, 2013, before the 138th running of the Preakness Stakes horse race. (AP Photo/Patrick Semansky)

Steam rises from Kentucky Derby winner Orb as a groom washes him after a workout at Pimlico Race Course in Baltimore, Friday, May 17, 2013. The Preakness Stakes horse race is scheduled to take place May 18. (AP Photo/Patrick Semansky)

Matt Slocum/AP In this image made taken a fisheye lens, the field breaks from the starting gate for the Preakness Stakes at Pimlico Race Course, Saturday, May 18, 2013, in Baltimore. Oxbow, fourth from right, won the race.